Telephone switchboard



Oct. 21, 1930. c, o Er AL 1,779,058

TELEPHONE SWITCHBOARD Filed April 22, 1929 2 Sheets-Sheet 1 C. BORGMANN WVEN R H. E. MART/Ne hf M HAeLA/vo A ATTORNEY Oct. 21, 1930- c. BORGMANN ET TELEPHONE SWITCEBOKRD 2 Sheet-Sheet 2 Filed April 22. 1929 lNVfNTOf-PS C BORGMANN hf E. MART/N6 h! M HA GLAND ATTORNEY Patented Get. :21, 1930 CHARLES BORGMANN, oreanar neon,

BU'JI-IERFGRD, AND HARVEY 1E. EAGL'AHD, 6 ?"EAST!) ORANGE,

NEW was; AND Hanna Ei ivrenrrnefor srsnons ro BELL'rnLnrHonE LABORATORIES, rnoonrona'rnn, ornnw $03K,"

N. Y., A CORPORATION OF NEW YORK TELE'EI-TONE SWITCHBOARD Application filed April 22,

boards.

The object of the invention is to make the wiring and apparatus of switchboards of this character more accessible.

In attaining this object a feature'of the invention resides in providing a base memher, on which is centrally mou'nteda combined relay rack and distributing frame and to the front edge of which is hinged a panel carrying the necessary signals, switching keys, etc. forward and downward stantially 60 degrees from its vertical or' closed position.

A unitary removable cover consisting of three sides and a top is also provided which is adapted, in conjunction with the base and front panel, to completely enclose the apparatus and wiring- This cover is held in posiconnection with the accompanying tion on the base by means of asystem of guides and flanges.

The following description, when read in drawing, will give a more complete understanding of the invention.

In the drawing V c Fig. 1 is a front view of a switchboard ac--- cording to the present invention showing the cover in place; 7

Fig. 2 shows the front panel in its open position and a portion of the cover broken away to show the interior including the distributing frame and relay rack;

Fig. 3 shows the rear of the switchboard with the cover pushed back andraised a short distance; r f

Fig. 4 shows a broken away view of a portion of the cover resting on the base but pushed back away from the front panel into its unlocked posit-ion;'and I Fig. 5 shows a similar broken away view of the cover in its locked position.

Referring to the drawing the switchboard structure consists essentially. of a base 1, a front panel 2 fastened to the base by a piano 1929. serial No. 35 m This panel is adapted to swing to a position'suba portion of the guide 4: 1s cut 1n the inner c in the inner bottom hinge .18 and a cover having a top and three sides adapted to completely enclose the apparatus and'wiring shown in Fig.2.

Fastened to both sides of the suitable manner, to the front are angular guides 4 on which base, in any and runningfrom the back ,'5

the cover '3 is adapted to rest and slide,the vertical portionsof the guides serving to prevent the cover from moving in a sidewise direction.

The forward end of eachof the guidese,

i.' e., the endtoward the front panel hasa' short bent-up portion 5' comprising a rearwa'rdly'extending flared portion 6. Fastened to the rear of the base is a strip turned or rolled edge 8 o A'groove 9 a little longer than the bent-up lower edge of the two sides of the cover 3,

which grooves cooperate with the bent-up portion 5 when the cover is in position on the guides 4 andpushed forward into 'its closed position.- A similar groove 11 is cut cover is in its closed position. ofthe grooves 9 and 11 with the bent-up portions 5 and 8 serves to lock the cover in position.

adapted to engage threaded portions or nuts 13 fastened to the top of the cover when it is I in position and the front panel closed.

Similarly, a screw 14 at the bottom of the rear wall of the cover is adapt-edto engage a nut member 15 attached to the base when the cover is in position. By this arrangement interior of the switchboard is made possible merely by loosening three screws and push- 5 ing the cover backwards a short distanca of the order of one or two inches, whereupon it may be lifted away from the base or pushed all the way back as desired. i 3

apparatus, "such as relays, condensers, Ire- 7 having a edgeof the rear of the cover and is adapted to cooperate with the rolled-over portion of the strip 7- wlien the Cooperation Screws 12 at the top of the front panel are" ready accessito the l.

. f d i 7 By referring-to F g.2the generalarrangetardatin coils,-etc. from'which a cable 17 runs to the keys, signals, etc. mounted on the front panel 2.

What'is'claimed is: g I a 1. In a desk type telephone switchboard, in combination, a vertical distributing frameand relay rack mounted on brackets supported from the base member, a vertical key shelf and signal apmember.

vertical distributing frame mounted on brackets supported from the base n forward coverenclosing three sides and paratus member hinged to said base member at its front edge and adapted to be tipped forward and downward to facilitate access to said apparatus and distributing frame, suitable Wiring interconnecting said key shelf member and said distributing frame and relay rack, a removable cover enclosing three sides and the'top of said switchboard and a system'of guides and interlocking flanges arranged to hold said cover in position on said basemember. I

In a desk type telephone switchboard in combination, a horizontal base member, a and relay rack member, a vertical key shelf and signal apparatus member hinged to said base member at its front edge and adapted to be tipped and downward to facilitate access to said apparatus and distributing frame, suitable wiring interconnecting said key shelf member and said distributing frame and relay rack, a removable cover enclosing three sides and the top of said switchboard,

means for attaching said cover to said base includmg a system of guides and flanges on said base member and flanges on said cover adapted to cooperate with the flanges on said base member, said cover in position when placed on said base member and moved into position a short distance in a forward horizontal direction.

3. In a desk type telephone switchboard, in combination,

base member at its front edge and adapted to mount switching andsignal apparatus and to be tipped forward and downward-to facilitate inspection and adjustment "of the apparatus, vertical members attached to said base'me'mber and adapted to. support apparatus mounting plates, and a removable the top of said switchboard and guidesand int'erlockingfianges adapted to hold said cover in position on said base In witness whereof, I hereunto subscribe my name this 19th day of April, 19.29.

. CHARLES BORGMANN. In Witness whereof, I hereunto subscribe my name this 20th day of April, 19:529.

HEBER MAR-Til In witness whereof, I hereunto subscribe my name this 19th day of April, 1929. p Y HARVEY'M. 'HAGLAND'.

a horizontal base member,-

and automatic means to lock a horizontal base member, a vertical key shelf member, hinged to said a system of metal 

